Rear sight for firearms



Patented 1m 12,1922.-

Patented Dec. 12, 1922.

UNITED STATES PATENT OFFHCE.

FRANK F. BURTON, OF MOUNT CARMEL, CONNECTICUT, ASSIGNOR TO WINCHESTER REPEATING ARMS 00., OF NEW HAVEN, CONNECTICUT, A CORPORATION.

REAR SIGHT FOR FIREARMS.

Application filed November 8, 1921. Serial No. 512,623.

To all whom it may concern Be it known that I, FRANK F. BURTON, a citizen of the United States, residing at Mount Carmel, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Rear Sights for Firearms; and I do hereby declare the following, when taken in connection with the accompanying drawings and the characters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this application, and represent, in-

Fig. l a detached enlarged plan View of a rear-sight embodying my invention.

Fig. 2 a view thereof in transverse section on the line 22 of Fig. 1.

Fig. 3 a view thereof in longitudinal section on the line 33 of Fig. 1.

Fig. 4 a plan View of the rear-mount frame.

Fig. 5 a view thereof in rear elevation.

Fig. 6 a reverse plan view of the elevationnut.

Fig. 7 a plan view of the elevation-nut spring.

Fig. 8 a view thereof in rear elevation.

My invention relates to an improved rearsight for firearms, the object being to produce a simple, compact, convenient, accurate and reliable device of the character described.

With these ends in view, my invention consists in a rear-sight for firearms, having certain details of construction and combinations of parts as will be hereinafter described and pointed out in the claims.

In carrying out my invention, as herein shown, I employ a, rear-sight frame comprising a horizontal body 10 provided at its respective ends with complementary guidelugs 11. The bottom of the said body is formed with a transverse dovetail 12 adapted to fit tightly into a transverse slot formed in the receiver of the gun, which is not shown. The lugs 11 aforesaid are formed on their opposed faces with vertical grooves 13 for the reception of a vertically adjustable slide 14, which is thus positioned and guided. The said slide is provided with a sighting-aperture 15 located somewhat above its center, while its opposite edges are formed below the said aperture with threads 16 coacting with the complementary female thread 17 of a knurled eleva ion-nut 18 mounted.

within two opposed horizontal slots 19 opening out of the bottom of the space 20, between the lugs 11 aforesaid. The said nut is held against vertical displacement by the upper walls of the slots 19 and against forward or rearward displacement by the slide 14, to which it is applied. The central perforation of the nut is counter-bored at its lower end, as at 21, to receive an annular sprin 22 provided with a pair of oppositely exten ing lugs 23 having their outer ends turned downwardly to fit into the respective ends of a vertically disposed slot 24 in the bottom of the horizontal body 10, whereby the said spring is held against turning. This slot also provides clearance for the lower end of the slide 14: when the same is in its lowest position. The said spring 22 is curved upwardly between its lugs 23, while at the apex of the arch it is struck up to form two folds 25 located opposite each other and at right angles to the lugs 23. These folds respectively enter two of four notches 26, arranged quartering in the under face of the elevation-nut 18, whereby the latter is yieldingly held against accidental rotation, and, at the same time, a click is provided whereby the vertical adjustment of the slide 14 may be gauged either by sound or feeling, as well as by sight.

I claim:

1. In a rear-sight for firearms, the combination with a frame comprising a body having a horizontal slot and two integral guidelugs upstanding therefrom above the said slot, a vertically-adjustable threaded slide positioned between and guided by the said guide-lugs, an elevation-nut located in the said slot and receiving the said slide, and means located between the lower face of the nut and the bottom of the said slot for normally holding the said nut against rotation.

2. In a rear-sight for firearms, the combination with a frame comprising a body having a horizontal slot and two integral guidelugs upstanding therefrom above the said slot, of a vertically-adjustable threaded slide positioned between the said lugs, a nut inserted fiatwise into the said slot and receiving the said slide, and a spring located in the said slot below the said nut and engaging therewith to hold the same against rotation and engaging with the frame for being itself held against displacement.

3. In a rear-sight for fire-arms, the combination with a frame comprising a body having a horizontal slot and a recess and two vertically-grooved, integral guide-lugs upstanding therefrom above the said slot; of a vertically-adjustable threaded slide positioned between the said lugs in the grooves thereof, having its lower portion provided with external screw threads and its upper portion provided with a sighting-aperture; an annular nut located in the said horizontal slot and receiving the threaded portion of the said slide and provided with a notch; and an annular, transversely-bowed spring interposed betweenthe said frame and the said nut, having a raised portion to coact with the said notch to hold the nut yieldingly against rotation and also having a lug coacting with the said recess to hold the spring against displacement.

In testimony whereof I have signed this specification inthe presence of two subscribing witnesses.

FRANK F. BURTON. Witnesses:

ERIK S. PALMER, A. E. HODGSON. 

